Registration is currently closed. Current users may invite new users at any time.

masto.ninja Mastodon hosted on masto.ninja

This is a general-purpose instance. Many users here are Japanese. You are welcome to join us!! Registration usually closed, but occasionally open! Instance info and rules are here.

Home to 400 users

Who authored 9,003 statuses

What is Mastodon?

Mastodon is a social network based on open web protocols and free, open-source software. It is decentralized like e-mail.

Administered by:

masto.ninja announcements @masto_ninja_announcements Learn more

Built for real conversation

With 500 characters at your disposal and support for granular content and media warnings, you can express yourself the way you want to.

You’re a person, not a product

Mastodon is not a commercial network. No advertising, no data mining, no walled gardens. There is no central authority.

Always within reach

Multiple apps for iOS, Android, and other platforms thanks to a developer-friendly API ecosystem allow you to keep up with your friends anywhere.

A more humane approach

Learning from failures of other networks, Mastodon aims to make ethical design choices to combat the misuse of social media.

Learn more